"3DCG" tag is a must for me. 2D games can be good as well, but the only thing that I really don't like is that 2D games often censor the most important "parts" (mostly japanese games).
I mean so long as there are characters I like the look of I cannot resist corruption, however a fair amount of the time I get mildly disappointed in corruption, mostly because I kind of want at least 1 character that gets extremely corrupted if I see the tag